Engine.



No. 716,463. Patented Dec. 23, |902.

" J. W. NEIL.

ENGINE.

(Application led Jan. 2, 1902.) (No Model.)

@m gy/47% M Uirnn Srarns ATnNr OFFICE.

JOHN W'. NEIL, OF CINCINNATI, OI'IIC.

ENGINE.

SPECIFICATION forming part of Letters Patent No. 716,463, dated December 23, 1902.

Application led January 2, 1902. Serial No. 88,021. (No model.)

T0 all whom, zt Wtcty concern:

Be it known that I, JOHN WrNEIL, a citizen of the United States of America, and a resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvementsin Engines,of which the following is a specification.

My invention relates to engines actuated by steam or similar fluid, in which the piston acts as a cut-off to regulate the admission of steam to the chamber of the valve which controls the passage of steam into and the exhaust thereof from the main cylinder to reciprocate said valve. Its object is an engine of the character described, whose valve may be removed readily from its casing for repairing and which is efficient in operation and simple in construction. This object is attained by the means described in the specification, speciiicallypointed out in the claims, and illustrated in the accompanying drawings, in which- Figure l is a central longitudinal sectional view of an engine embodying my invention. Fig. 2 is a transverse sectional view of the same upon irregular line z vz, Fig. l. Fig. 3 is a detail longitudinal central sectional view of the valve-disks and rod.

Referring to the parts, a chamber A is secured centrally upon top of main cylinder B, within which reciprocates piston C. Centrally located in the bottom of chamber A is an exhaustport d., and upon each side of it are ports c and n?, respectively, which communicate through channels Z) and h With the ends of cylinder B. Chamber A interiorly has a straight cylindrical bore, Within which are three cylindrical disks D, D', and D2 of equal diameter, secured upon or formed integral with a rod d at a distance apart equal to the distance from one side of the exhaust to the extreme edge of an admission-port. Rod d at one end extends through the head of cylinder Ainto a secondary smaller chamber A and there receives a removable disk or piston E. Steam enters chamber A through a channel as, which communicates with the chamber at a distance from each end equal to the Width of disks D and D2. Channels b2 and b3, respectively, run from each end of cylinder B at distances from its ends slightly greater than the thickness of piston C to the opposite ends of chamber A. Rod d has a channel d' running from a point upon the left of disk D and coming out upon the left-hand face of disk E and another channel d2 running from a point upon the left of disk D2 to point upon the right of disk E.

In operation suppose the parts to be in the position shown in Figs. l and 2 and piston C to be moving from left to right. Steam then enters cylinder B through channel b. Upon the left-hand faces of disks D D2 and the right-hand face of disk E there is no pressure, since they are in communication with the eX- haust. Upon the right-hand faces of disks D and Diand upon the left-hand faces of D' and E there is the pressure of steam. The pressures upon D and D2 counterbalance each other, and D being larger in area than E the valve is held thus in its left-hand position, holding the left-hand end of cylinder B Vin communication with the live steam and the right-hand end in communicationwith the exhaust. Now when piston C has passed channel b3 the live steam goes through said channel to the left face of disk D. We then have the pressures upon the right and left faces of disk D counterbalancing each other, the pressure upon the left-hand face of D' counterbalancing that on the right-hand face of D2. The pressure on the left-hand face of E being unbalanced moves the valve to its right-hand position, puts the right-hand end of cylinder B in communication With the steam and the left-hand end with the exhaust to return-piston C. To remove the Valve from its chamber, it is necessary only to loosen the removable end of the chamber and to disengage disk E from rod tl.

What I claim is l. In an engine the combination with a main cylinder and a reciprocating piston therein, a valve-chamber having an exhaust and admission ports for admitting and exhausting the actuating fluid from each end of the main cylinder, a secondary chamber at one end of the valve-chamber, a rod Within the valve-chamber extending at one end into the secondary chamber,I three disks secured upon the rod Within the Valve-chamber, a disk upon the rod Within the secondary chamber, channels running from each end of IOO the main cylinder at distances therefrom greater than the thickness of the piston to the opposite ends of the valve-chamber, and channels in the rod running from points thereof Within the cylinder one of Which is in communication With the pressure While the other is in communication With the exhaust to points upon opposite sides ofthe disk Within the secondary chamber, substantially as shown and described.

2. In an engine in combination with a main cylinder and a reciprocating piston therein, a Valve-chamber having an exhaust and admission ports for admitting and exhausting the actuating fluid from each end of the main cylinder, a secondary smaller chamber at one end of the valve-chamber, a rod Within the valve-chamber extending at one end into the secondary chamber, three disks of equal area JOHN W. NEIL.

Witnesses:

W. F. MURRAY, EMMA LYFORD. 

